STMicroelectronics STM32H745XGH6

Overview

STM32H745XGH6 from STMicroelectronics is a dual-core 32-bit Arm® Cortex®-M7 (up to 480 MHz) and Cortex®-M4 (up to 240 MHz) microcontroller with 2 MB flash, 1 MB RAM, integrated SMPS regulator, and 46 communication/analog peripherals. It supports real-time deterministic control in industrial PLCs, motor drives, and embedded vision systems requiring concurrent high-performance computation and low-latency peripheral handling.

For engineers reviewing the STM32H745XGH6 datasheet, STM32H745XGH6 pinout, STM32H745XGH6 application, or STM32H745XGH6 equivalent, key selection criteria include dual-core asymmetric execution capability, on-chip SMPS for power efficiency, hardware JPEG codec for image processing, and FDCAN FD support for automotive diagnostics and industrial fieldbus integration.

Technical Context

The device implements a three-domain power architecture (D1/D2/D3), enabling independent clock gating and voltage scaling across high-performance, communication, and system-control subsystems. Its interconnect matrix comprises one AXI and two AHB bus matrices with five AHB2-APB and two AXI2-AHB bridges, ensuring deterministic latency for time-critical M7 tasks while isolating M4 peripheral traffic.

Dual-core operation is coordinated via shared memory with hardware semaphores and interrupt forwarding; the M7 core features double-precision FPU, 32 KB L1 cache (16 KB I-cache + 16 KB D-cache), and MPU, while the M4 includes ART Accelerator for zero-wait-state flash execution and DSP instructions for signal processing workloads.

Key Specifications

Pinout & Package

STM32H745XGH6 uses a UFBGA176+25 (10 × 10 mm) package with 176 signal balls plus 25 power/ground balls, compliant with ECOPACK2 environmental standards and rated for extended temperature operation up to 125 °C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core Arm Cortex-M7/M4 microcontroller applications.

Compared with STM32H753VIT6, the STM32H745XGH6 adds true dual-core concurrency and CAN FD redundancy at higher power efficiency; versus i.MX RT1176DVMAA, it trades raw M7 speed and GPU for integrated power management and hardware JPEG-critical for thermally constrained edge nodes.

Availability

STM32H745XGH6 is available at Aetrix Electronics and suitable for industrial motor drives, automotive diagnostic gateways, embedded vision edge nodes, and HMI-controlled PLCs requiring stable component supply across long-life production cycles.

Supply support for STM32H745XGH6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, analog, and MEMS technologies for industrial, automotive, and consumer markets.

The STM32H7 series targets high-end embedded applications demanding real-time performance, security, and energy efficiency-designed specifically for industrial automation, automotive telematics, and AIoT edge devices with stringent functional safety and thermal constraints.

FAQ

What is the maximum operating frequency of each core in the STM32H745XGH6?

The Cortex-M7 core operates at up to 480 MHz with double-precision FPU and L1 cache, delivering 1027 DMIPS; the Cortex-M4 core runs at up to 240 MHz with single-precision FPU and ART Accelerator, achieving 300 DMIPS. Both cores support independent voltage scaling and clock domains, enabling dynamic performance/power trade-offs.

Does the STM32H745XGH6 support hardware encryption for secure firmware updates?

Yes-it integrates AES-128/192/256, SHA-256, and public-key acceleration (PKA) engines, along with active tamper detection and ROP/PC-ROP protection. These features enable secure boot, encrypted OTA updates, and cryptographic key storage in dedicated secure memory regions, meeting IEC 62443-3-3 SL2 requirements.

How does the integrated SMPS regulator impact PCB layout and thermal design?

The SMPS requires external components: one 10 µF ceramic capacitor per VCAP pin, a 1 µH shielded inductor, and two 10 µF output capacitors. Layout must minimize loop area between SW, VCAP, and PGND pins; thermal design benefits from the SMPS's >90% efficiency at 1 A, reducing core die temperature rise by ~12 °C versus LDO-only operation.

Can the STM32H745XGH6 simultaneously run Linux on the M7 core and a real-time RTOS on the M4 core?

No-Linux requires MMU support, which the Cortex-M7 in this device lacks (it has only an MPU). The M7 supports real-time OSes like FreeRTOS, Zephyr, or SafeRTOS; asymmetric multicore use typically involves M7 running deterministic control loops and M4 handling communication stacks or safety monitors, both under lightweight RTOS kernels.